any male that is gay, but will not out right admit it.
most often white males about 18-22
usually found in service academys.
a common misconception is that its required that one plays lacrosse to be a bro. this is simply not true.

a prime example of bro behavior is going out for a nice game of football in the snow on the beach. Another would be taking a couple of cases of natty light to the beach to pregame with just the bros.

A male or (supa awesome ) female that you Dont bail on . You got each others back. You make fun of them, and still buy them a shot. Secret handshakes may be involved. You may nick name each other with the word BRO in it.

But like fight club.. You're not supposed to talk about it..
Oh wait . shit.

Brolos: "hey! Fuck your other people we ate watching game of thrones tonight"

A young individual, usually between the age of 16-20 that shows good intentions a majority of the time, and will often place other friends above themselves. This includes but is not limited to: spotting a friend at Taco Bell and not asking for incentive, donating perfectly good clothes to close friends that they didn't really want to give away, or overall providing a humorous and somewhat waggish experience for others during chill seshes. Strictly used regarding male relationships.

Not to be confused with brother, though the two are often synonymous, as a bro is close enough a majority of the time to be considered a brother. It is often insulting to never make this comparison if the bro-lationship has continued for more than 3 years.

Tommy: Yo, who's that new kid everyone keeps talking about? Jake, right?
Jacob: Yeah man, I just hung out with him yesterday... he's a fucking bro!